Aptitude - Problems on Ages - Discussion
Discussion Forum : Problems on Ages - Data Sufficiency 2 (Q.No. 2)
Directions to Solve
Each of the questions given below consists of a question followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question.
2.
What is Ravi's present age? | |
I. | The present age of Ravi is half of that of his father. |
II. | After 5 years, the ratio of Ravi's age to that of his father's age will be 6 : 11. |
III. | Ravi is 5 years younger than his brother. |
Answer: Option
Explanation:
I. Let Ravi's present age be x years. Then, his father's present age = 2x years.
| II. After 5 years, | Ravi's age | = | 6 |
| Father's age | 11 |
III. Ravi is younger than his brother.
| From I and II, we get | x + 5 | = | 6 | . This gives x, the answer. |
| 2x + 5 | 11 |
Thus, I and II together give the answer. Clearly, III is redundant.
Correct answer is (A).
Discussion:
5 comments Page 1 of 1.
Anome said:
1 year ago
Let Ravi's present age be x years.
And ravi's father age be y years.
x = 0.5 y ---> eqn.1
After 5 years, so x+5 & y+5,
x+5/y+5 = 6/11
11(x+5) = 6(y+5) ---> equ.2.
put equ.1 into equ. 2,
y=50.
Then, put y into eqn.1,
x=25.
And ravi's father age be y years.
x = 0.5 y ---> eqn.1
After 5 years, so x+5 & y+5,
x+5/y+5 = 6/11
11(x+5) = 6(y+5) ---> equ.2.
put equ.1 into equ. 2,
y=50.
Then, put y into eqn.1,
x=25.
(1)
VIGNESH said:
3 years ago
Is Ravi age is 25? Please explain it.
Nishant bhat said:
3 years ago
@Azeema.
Father's age is 2x (since double of Ravi's age, and after 5yrs mentioned as above, will be 2x+5.
Father's age is 2x (since double of Ravi's age, and after 5yrs mentioned as above, will be 2x+5.
Azeema said:
3 years ago
How 2x+5? Explain please.
Ankit kumar said:
7 years ago
Good one. Thanks for giving this question.
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